The numbers are relatively prime, or co-prime.
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If the GCF of two composite numbers is 1, they are co-prime or relatively prime.
There is no standard GCF in that instance. It varies according to which numbers you select.
Composite. All whole numbers ending in zero are composite.
The Greatest Common Factor, or GCF.
No. Two composite numbers, like 4 and 9, can have a GCF of 1. They are said to be relatively prime or co-prime.
There cannot be a greatest common factor if there are not at least two numbers to compare. The greatest common factor is the largest factor that all the numbers have in common - the largest factor that they all share.
14. Alternatively, a single number cannot have a greatest common factor because "common" refers to factors that two or more numbers have in common. You have only one number.